As to the terms "comprising" vs "consisting", it has been clarified that the expression "consisting essentially" means for chemical compounds or compositions specific that further components can be present, namely those not materially affecting the essential characteristics of the compound or composition. For other entities, it is clarified that the meaning is identical to "comprising" (http://www.epo.org/law-practice/legal-texts/html/guidelines2018/e/f_iv_4_21.htm).